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Vacuum sealer never ending
Our “Boss Z 2001” vacuum sealer is cycling forever. When I close the lid, it builds vacuum. At 99 (full vacuum) it seals the bag and release the pressure. But instead of ending here (where the lid pops up), it just starts the cycle again (from 20 and up to 99), release pressure. And vacuum again.
Any clue what this could be?
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9 Replies
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How old is this machine?
What condition is the membrane pad in?
BTW, Z-2001 is the control system. What model is the sealer?
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It’s 2 years old. I’ll check the membrane tonight (I’m not with the machine).
Someone else told me it could be a bad seal, but wouldn’t it then just struggle to reach maximum vacuum?
And it definitely wouldn’t seal the bag, release pressure and then start over again?
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Ok, does this machine use a gas system?
The 2001 has sensors for the pump and valve to ensure a good seal. It may be that the pump oil hasn’t been changed often enough to reach the proper setting. Or the Maintenace button has been pushed for continuous run to warm it up. Designed to help remove the moisture from the pump. In that mode it will run 15 min and do several cycles.
I would first start by depowering the whole unit for 10 minutes and doing a reprogram. Make sure that the gas purge is set to “0”. That would be a good time to change the oil. Should be done monthly. Vacuum pumps do not like moisture. And the oil absorbs it from the air and moist products. Even when not in use. Once in the oil, as it circulates in the pump, it flashes to vapor when it hits the suction side and makes foam decreasing the pumps power to pull a full vacuum.
If a hard reboot doesn’t do it, you may have a sensor or control board problem.
This may help: Operating instructions (vacuum-boss.com)
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It doesn’t have any external gas system(?).
And it’s been running on the same oil since new. I changed it when the problem appeared, but that didn’t change anything. I tried the maintenance button after it happened, but I’m not sure if this is cancelled then powered off, or if it remembers?
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That’s why I think a hard reboot will help. Either the board is getting a signal to start, or the machine is in service mode. Also when you reboot, set it for the liquid setting. That is the lowest vacuum and may help it the sensor is off.
Is this a floor or bench model?
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It’s a bench model. You’re right. When I put it into the lowest vacuum setting, it manages to finish with only one cycle (like normal).
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That indicates you have a sensor or vacuum problem. I’d attach a micron vacuum gauge to it to verify the pump is getting to range. Bordon tube gauges are always way off with vacuum. Also check the sensor cables to be connected correctly and have clean connections.
Did you do a fresh oil change? If it had been used to seal any high moisture bags, and the product wasn’t cold, it may have to have several changes to remove any moisture. One of my refrigeration pumps got a small slug of water during a repair, and it took 6 changes before the pump would get back to pulling 400 microns. Amount needed to clean a system that’s near freezing.
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Surprise 🙂 I found a small crack in the lid seal. So I’m replacing it and hope that will take care of it
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That explains it. Chamber vacuums exert a lot of pressure on the covers. Usually, they make a loud pop when they crack. I’ve had to replace 3 covers on mine. Does your machine have shim tape under the gasket. My Vacmaster has it at strategic points to help with cover longevity.
I apologize for not mentioning the cover/seal as a item. I’ve never worked on a sensing one. Makes sense though for quality packaging.
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